Appropiate selection of Wheel size on Zwift if I use a MTB 27.5 tyre

Android
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Apropriate selection of Wheel size on Zwift if I use a MTB 27.5 tyre
Hello Guys, i appreciate your help and advices to make a proper selection on wheel size to use zwift on my 27.5 MTB bike and Wahoo Speed and Cadence sensor.
I actually use a 650c option, but the speed adquired on zfwit is not accurate (while on Wahoo Bike computer is showing 30 kph, on zwift my avatar get move to 15kph or minus).

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Hi @Guillermo_Cervera_Pi welcome to Zwift forums.
What brand and model of trainer do you have?

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Hi @shooj ! I use a basic roller with a wahoo speed and cadence sensors.

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@Guillermo_Cervera_Pi
This is a challenging one. With the inherently low resistance of rollers, it’s hard to generate a power curve estimate (what Zwift calls Zpower) based on speed sensor x cadence x tire diameter.

Rollers work better in game if you had a power meter that reads your actual (not estimated) power output.